Uninitialized array element
Review this Rust buffer initializer using MaybeUninit.
What a strong answer looks like
Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix, specific and kind.
0:00 of about 30 min
Mark a line and say what kind of problem it is.0 findings
1use std::mem::MaybeUninit;
2
3fn make_array() -> [u32; 4] {
4 let mut arr: [MaybeUninit<u32>; 4] = unsafe { MaybeUninit::uninit().assume_init() };
5 for i in 0..3 {
6 arr[i] = MaybeUninit::new(i as u32 * 2);
7 }
8 unsafe { std::mem::transmute::<_, [u32; 4]>(arr) }
9}
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